Sweet Potato Au Gratin is the ultimate comfort food casserole recipe.
Thinly sliced sweet potatoes, smothered in a cream sauce, topped with cheese. Hearty and delicious. You will also want to give these stuffed sweet potatoes a try too.
This au gratin potato recipe was originally posted in the 41st edition of the Milk Calendar and I shared it in December 2017 as a sponsored post.
I was thrilled when I was asked to recreate the January 2018 recipe Hearty Sweet Potato Au Gratin because I am a potato lover.
I was so excited when I was asked to take part in the #MilkCalendar campaign that year. My fridge is ALWAYS stocked with several varieties of cheese. I use it in delicious recipes for any meal of the day. When I want a snack, crackers and cheese are my “go-to” options most days of the week.
RECIPE and INSTRUCTIONS for this sweet potato gratin recipe can be found at the bottom of this post.
These scalloped sweet potatoes are simple and oh so delicious. Cheese is the most important factor in au gratin potatoes.
You Will Need:
- sweet potatoes
- butter
- garlic
- flour
- cream
- sharp cheddar cheese
- fresh thyme
You will want to select sharp, bold cheeses. Old cheddar, gruyere, Swiss or feta would be awesome choices.
Most people will say there is NO difference. Both use thinly sliced potatoes cooked in a casserole dish. Scalloped potatoes ALWAYS have a cream sauce. Au gratin is ALWAYS is cooked with cheese. This recipe contains both. Scalloped potatoes usually have a breadcrumb topping. Gratin Dauphinois does not.
Preparing This Sweet Potato Au Gratin Bake
These cheesy au gratin potatoes are not difficult. You have a couple of parts to this recipe. The cream sauce, and the layering of the casserole. See the recipe card for the exact instructions, but here is the quick low down.
Step ONE:
- Peel and slice your sweet potatoes (about ⅛ inch).
- Grate your cheese.
- Preheat the oven, and prepare a casserole dish.
Step TWO:
- Make the cream sauce in a medium saucepan.
- This will take about 4-5 minutes.
Step THREE:
- Layer the casserole.
- Start with the potatoes.
- Add some cream sauce, and thyme.
- Repeat the layers.
- Cover and bake.
- Remove from oven and take off the foil.
- Add the grated cheese and bake uncovered until bubbly.
This Sweet Potato Au Gratin has already become a favourite here. We like to make it different each time by switching up the cheese.
Perfect for any night of the week. Awesome on the holiday dinner table too. It is the perfect side to Crispy Baked Chicken Drumsticks.
Craving more delicious potato recipes?
Looking for another sliced potato recipe? Crispy Cast Iron Potatoes make the perfect side to any meal of the day.
Baked Beans and Sweet Potatoes is an easy and affordable meal, perfect for busy weeknights. You will be amazed at how a simple can of beans can be so delicious.
How about a delicious one-pan dinner? Easy Corned Beef and Potato Skillet is perfect. In fact, we love this on St. Patrick’s Day. A little twist on corned beef and cabbage.
If you are a salad lover, this Warm Potato Salad with Dill & Smoked Salmon is out of this world. In fact, I have a great potato salad roundup with 27 mouthwatering recipes.
Need the perfect party appetizer? Smoked Salmon Potato Appetizers are elegant and easy to prepare. They fly off the party tray.
I don’t know of anyone who does not love fries. Crispy Spicy Fries are a healthy alternative since they are made in the air fryer.
In case you didn’t get one of these FANTASTIC calendars, don’t fret, I’ve got you covered. Visit MilkCalendar.ca to find out how to order a copy. Be sure to have a look at all the great online recipes and helpful videos too. I know lots of people who have been collecting these calendars for years.
Milk Calendar Hearty Sweet Potato Au Gratin
Ingredients
- 1 ½ pounds sweet potatoes
- 2 tablespoons butter
- 1 clove garlic (minced)
- ½ teaspoons salt
- 2 tablespoons all-purpose flour
- 2 cups 18% cream
- 2 tablespoons fresh thyme (chopped)
- ½ cup Canadian cheddar (shredded)
Instructions
- Preheat oven to 375º F, and grease a 8×8 inch baking pan. Set aside.
- Peel potatoes and carefully slice into ⅛ inch thick rounds. Set aside.
- Grate/shred cheese. Set aside.
To make the Cream Sauce:
- In a medium saucepan melt butter over medium heat.
- Add garlic and salt. Stir 1 minute.
- Whisk in flour until combined.
- Gradually add cream, whisking until combined and smooth.
- Bring to a boil, and heat until thickened (2-3 minutes), whisking occasionally. Remove from heat when done.
To layer the Sweet Potato Au Gratin:
- Layer ½ the potatoes into the prepared baking dish.
- Scatter ½ the chopped thyme on top.
- Top with ½ the cream sauce.
- Repeat with the potatoes, sauce and thyme.
- Press down slightly to even out layers and get all potatoes covered in cream.
- Cover with foil, and bake for 30 minutes.
- Take dish out of the oven, and remove foil.
- Sprinkle grated cheese (and additional thyme if you like), and bake uncovered for 15 minutes until top is bubbly and deep golden brown.
- Remove from oven and let stand for 10 minutes.
- ENJOY!
Maman de sara
I would like to try a Canadian dish, I love gratin with sweet potatoes!
Homemade & Yummy
This is so delicious….ENJOY!!
Dorothy at Shockingly Delicious
I love sweet potatoes so I can’t believe I never thought about this dish! Can’t wait!
Homemade & Yummy
I know….it is soooo good!!
Denise Wright
These look fantastic! We have ALOT of cheese in this household …. I mean ALOT. We would be hard pressed to go without milk products. I love that you use sweet potatoes in this dish. It’s just the perfect idea!
Homemade & Yummy
Works like a charm….and YES to the cheese. We are always stocked too.
Amelie
Congratulations for being featured on the calendar! And your recipe looks gorgeous. I just pinned it!
Homemade & Yummy
Thanks…I was only testing/recreating a recipe….but it was fun and delicious.
Anne-Marie
Ashamed to admit I never made Au gratin with sweet potato before. This looks so creamy and cheesy, YUM! Have to try this soon!
Homemade & Yummy
This was so good….and I really need to make it again soon.
Carrie
Oh how gorgeous! I remember this casserole from my childhood. Looks delicious.
Homemade & Yummy
It sure was. We really enjoyed it.
Marisa Franca @ All Our Way
We’re lucky — everyone in our family loves au gratin potatoes. I would love to make them more often but we do watch our calories. It seems like the older we get the harder it is to burn those calories off! But this is one dish that we have to make. I can taste the creaminess of the milk and cheese!! YUMMY!
Homemade & Yummy
YES it is not fair….we have to work too hard to burn off all the delicious food that we cook.
Elizabeth
That is a seriously gorgeous looking recipe, and I love the idea of the dairy farmers getting together to create a recipe calendar. Genius!
Homemade & Yummy
It has been a Canadian tradition for 41 years now….so many great recipes in there.
Elizabeth
I had no idea! How did I never see this growing up in Canada! (I’m 41 now, myself) 🙂
Homemade & Yummy
Well we learn something new about Canada all the time…even though we live here.
Patty
Oh so love potato gratin, it must be awesome with sweet potatoes, Love it and the addition of cream is mandatory in my opinion 🙂
Homemade & Yummy
It is a RICH and delicious dish for sure.
Jolina
I absolutely love this dish. Potatoes, cheese and cream. What more can I ask for?? And I’m excited about the Milk Calendar too. A year of deliciousness sounds good to me!
Homemade & Yummy
This really was delicious…and now I can make a version of scalloped potatoes my family loves.
Lisa
Holy richness – 2 cups of cream??? It looks delicious, but I’m gonna have to put my skinny jeans away for the rest of the season!
Homemade & Yummy
Well you don’t need a big portion, so it works for me…and it is soooo delicious.
Tara
Yum! I will have to check out the 2018 Milk Calendar. I’m a huge fan of all things cheese. I love how you made the gratin using sweet potatoes. Such a healthy twist.
Homemade & Yummy
Yes…now I can have scalloped potatoes since my family likes these now.
Jacqueline Meldrum
That is real comfort food. I would love this. Sweet potatoes are just gorgeous. Always! What a great idea!
Homemade & Yummy
This is one delicious dish for sure.
Helene
Oh my my this is so scrumptious and lovely??
Thanks for such a lovely recipe?
Homemade & Yummy
Thanks so much. We really enjoyed it.
Meeta
I love gratins especially with sweet potatoes. A Milk calendar with recipes sounds like a gem to have. I think often there are old valuable recipes that many of us have forgotten to make in all the trendy food fad these days. A gratin is a hearty and perfect recipe for the cold months!
Homemade & Yummy
Oh my…this was so good. I need to make it again soon.